尖晶石锰酸锂表面包覆改性材料作用机理研究进展

发布时间：2019-06-30 20:10

【摘要】：尖晶石锰酸锂具有优异的安全性、低廉的价格、良好的大电流充放电能力和耐过充放性能以及环境友好等优点,是一种能被广泛应用于锂离子动力电池的正极材料之一。然而,锰酸锂锂离子电池目前仍然存在容量衰减较快以及高温性能较差的问题,这严重制约了其在动力电池方面的应用。为此发展起来的表面包覆改性技术能有效的改善锰酸锂的这些问题。到目前为止,发展出了许多包覆材料,有碳材料、氧化物材料等。就这些包覆材料对锰酸锂材料性能改善的机理来进行分类,详细讨论了表面包覆技术如何来改善锰酸锂的循环性能和高温性能,提出其进一步的发展方向。
[Abstract]:Spinel lithium manganate is one of the cathode materials which can be widely used in lithium ion power batteries because of its excellent safety, low price, good high current charge and discharge resistance, overcharge and discharge resistance and environmental friendliness. However, lithium manganate ion batteries still have the problems of fast capacity attenuation and poor high temperature performance, which seriously restricts the application of lithium manganate ion batteries in power batteries. Therefore, the surface coating modification technology developed can effectively improve these problems of lithium manganate. So far, many coating materials, such as carbon materials, oxide materials and so on, have been developed. According to the mechanism of improving the properties of lithium manganate materials, the mechanism of improving the properties of lithium manganate materials is classified, and how the surface coating technology can improve the cycle performance and high temperature performance of lithium manganate materials is discussed in detail, and the further development direction of lithium manganate materials is put forward.
【作者单位】：西南交通大学超导与新能源研究开发中心材料先进技术教育部重点实验室;西南交通大学生命科学与工程学院;西南交通大学机械工程学院;
【基金】：国家自然科学基金资助项目(50907056,51602266) 四川省重点研发计划资助项目(2017GZ0109) 四川省科技支撑资助项目(2016GZ0273,2016GZ0275) 四川省成都市科技惠民工程资助项目(2014-HM01-00073-SF)
【分类号】：TM912

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